<template>
    <div class="wrapper">
        <!--header-->
        <header>
            <p>商家信息</p>
        </header>
        <!--商家logo-->
        <div class="business-logo">
            <img :src="business.businessImg">
        </div>
        <!--商家信息-->
        <div class="business-info">
            <h1>{{ business.businessName }}</h1>
            <p>&#165;{{ business.startPrice }}起送 &#165;{{ business.deliveryPrice }}配送</p>
            <p>{{ business.businessExplain }}</p>
        </div>
        <!--食品列表-->
        <ul class="food">
            <li v-for="(item,index) in foodArr">
                <div class="left">
                    <img :src="item.foodImg">
                    <div class="info">
                        <h3>{{ item.foodName }}</h3>
                        <p>{{ item.foodExplain }}</p>
                        <p>&#165;{{ item.foodPrice }}</p>
                    </div>
                </div>
                <div class="right">
                    <div><i class="fa fa-minus-circle" @click="minus(index)" v-show="item.quantity!=0"></i></div>
                    <p><span v-show="item.quantity!=0">{{ item.quantity }}</span></p>
                    <div><i class="fa fa-plus-circle" @click="add(index)"></i></div>
                </div>
            </li>
        </ul>
        <div class="pagebottom"></div>
        <!--购物车部分-->
        <div class="cart">
            <div class="left">
                <div class="icon" :style="totalQuantity==0?'background-color:#505051;':'background-color:#3190E8;'">
                    <i class="fa fa-shopping-cart"></i>
                    <div class="quantity" v-show="totalQuantity!=0">{{ totalQuantity }}</div>
                </div>
                <div class="info">
                    <p>&#165;{{ totalPrice_Fixed2 }}</p>
                    <p>另需配送费{{ business.deliveryPrice }}元</p>
                </div>
            </div>
            <div class="right">
                <!--不够配送费-->
                <div class="twosituations" v-show="totalPrice<business.startPrice"
                     style="background-color: #535356;cursor: default;">
                    &#165;{{ business.startPrice }}起送
                </div>
                <!--够配送费-->
                <div class="twosituations" @click="toOrder" v-show="totalPrice>=business.startPrice">
                    去结算
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import {useRoute, useRouter} from "vue-router";

let router, route

export default {
    name: "BusinessInfo",
    data() {
        route = useRoute()
        return {
            businessId: route.query.businessId,
            cartArr: [],
            business: {},
            foodArr: [],
            user: {}
        }
    },
    created() {
        router = useRouter()
        this.user = this.$getSessionStorage('user');
        //根据businessId查询商家信息
        let url = `business/${this.businessId}`;
        this.$axios.get(url).then(response => {
            this.business = response.data.data;
            this.$axios.get(url + '/foods').then(response => {
                this.foodArr = response.data.data;
                for (let foodItem of this.foodArr) {
                    foodItem.quantity = 0;
                }
                if (this.user != null) {
                    this.listCart();
                }
            }).catch(error => {
                console.error(error);
            });
        }).catch(error => {
            console.error(error);
        });
    },
    methods: {
        listCart() {
            let url = `cart/${this.user.userId}`;
            this.$axios.get(url, {
                params: {
                    businessId: this.businessId
                }
            }).then(response => {
                this.cartArr = response.data.data;
                //遍历所有食品列表
                for (let foodItem of this.foodArr) {
                    foodItem.quantity = 0;
                    for (let cartItem of this.cartArr) {
                        if (cartItem.foodId === foodItem.foodId) {
                            foodItem.quantity = cartItem.quantity;
                        }
                    }
                }
                this.foodArr.sort((o1, o2) => o1.foodId - o2.foodId);
            }).catch(error => {
                console.error(error);
            });
        },
        add(index) {
            //首先登录验证
            if (this.user == null) {
                router.push({name: 'Login'});
                return;
            }
            if (this.foodArr[index].quantity === 0) {
                //insert
                this.addCart(index);
            } else {
                //update
                this.updateCart(index, 1);
            }
        },
        minus(index) {
            //首先登录验证
            if (this.user == null) {
                router.push({name: 'Login'});
                return;
            }

            if (this.foodArr[index].quantity > 1) {
                //update
                this.updateCart(index, -1);
            } else {
                //delete
                this.removeCart(index);
            }
        },
        addCart(index) {
            let url = 'cart';
            this.$axios.post(url, JSON.stringify({
                userId: this.user.userId,
                businessId: this.businessId,
                foodId: this.foodArr[index].foodId
            }), {
                headers: {'Content-Type': 'application/json;charset=utf-8'} //设置请求头
            }).then(response => {
                if (response.data.code === 200) {
                    //此食品数量要更新为1；
                    // console.log(this.cartArr)
                    // this.cartArr.push({carId:response.data.data,quantity:1})
                    this.foodArr[index].quantity = 1;
                    this.listCart();
                    this.foodArr.sort();
                } else {
                    alert('向购物车中添加食品失败！');
                }
            }).catch(error => {
                console.error(error);
            });
        },
        updateCart(index, num) {
            let url = 'cart';
            this.$axios.put(url, JSON.stringify({
                cartId: this.cartArr[index].cartId,
                userId: this.user.userId,
                businessId: this.businessId,
                foodId: this.foodArr[index].foodId,
                quantity: this.foodArr[index].quantity + num
            }), {
                headers: {'Content-Type': 'application/json;charset=utf-8'} //设置请求头
            }).then(response => {
                if (response.data.code === 200) {
                    //此食品数量要更新；
                    this.foodArr[index].quantity += num;
                    this.foodArr.sort();
                } else {
                    alert('向购物车中更新食品失败！');
                }
            }).catch(error => {
                console.error(error);
            });
        },
        removeCart(index) {
            //TODO
            let url = `cart/${this.cartArr[index].cartId}`;
            this.$axios.delete(url).then(response => {
                if (response.data.code === 200) {
                    //此食品数量要更新；
                    this.foodArr[index].quantity = 0;
                    this.foodArr.sort();
                } else {
                    alert('向购物车中删除食品失败！');
                }
            }).catch(error => {
                console.error(error);
            });
        },
        //跳转到订单页面
        toOrder() {
            this.$setSessionStorage('business', this.business)
            this.$setSessionStorage('cartArr', this.cartArr)
            this.$setSessionStorage('foodArr', this.foodArr)
            router.push({name: 'Orders'});
        }
    },
    computed: {
        //食品总价格
        totalPrice() {
            let total = 0;
            for (let item of this.foodArr) {
                total += item.quantity * item.foodPrice;
            }
            return total;
        },
        //食品总数量
        totalQuantity() {
            let quantity = 0;
            for (let item of this.foodArr) {
                quantity += item.quantity;
            }
            return quantity;
        },
        //解决浮点数问题
        totalPrice_Fixed2() {
            let total = 0;
            for (let item of this.foodArr) {
                total += item.quantity * item.foodPrice;
            }
            return total.toFixed(2);
        },
        //结算价格
        totalSettle() {
            return this.totalPrice + this.business.deliveryPrice;
        }
    }
}
</script>

<style scoped>
/**************************总容器**************************/
.wrapper {
    width: 100%;
    height: 100%;
}

/**************************header**************************/
.wrapper header {
    width: 100%;
    height: 12vw;
    background-color: #0097FF;
    color: #FFF;
    font-size: 4.8vw;

    position: fixed;
    left: 0;
    top: 0;
    z-index: 1000;

    display: flex;
    justify-content: center;
    align-items: center;
}

/**************************商家logo**************************/
.wrapper .business-logo {
    width: 100%;
    height: 35vw;
    margin-top: 12vw;

    display: flex;
    justify-content: center;
    align-items: center;
}

.wrapper .business-logo img {
    width: 40vw;
    height: 30vw;
    border-radius: 5px;
}

.wrapper .business-info {
    width: 100%;
    height: 20vw;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}


.wrapper .business-info h1 {
    font-size: 5vw;
}

.wrapper .business-info p {
    font-size: 3vw;
    color: #666;
    margin-top: 1vw;
}

/**************************食品列表**************************/
.wrapper .food {
    width: 100%;
}

.wrapper .food li {
    width: 100%;
    box-sizing: border-box;
    padding: 2.5vw;
    user-select: none;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wrapper .food li .left {
    display: flex;
    align-items: center;
}

.wrapper .food li .left img {
    width: 20vw;
    height: 20vw;
}

.wrapper .food li .left .info {
    margin-left: 3vw;
}

.wrapper .food li .left .info h3 {
    font-size: 3.8vw;
    color: #555;
}

.wrapper .food li .left .info p {
    font-size: 3vw;
    color: #888;
    margin-top: 2vw;
}

.wrapper .food li .right {
    width: 16vw;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

.wrapper .food li .right .fa-minus-circle {
    font-size: 5.5vw;
    color: #999;
    cursor: pointer;
}

.wrapper .food li .right p {
    font-size: 3.6vw;
    color: #333;
}

.wrapper .food li .right .fa-plus-circle {
    font-size: 5.5vw;
    color: #0097EF;
    cursor: pointer;
}

.wrapper .pagebottom {
    width: 100%;
    height: 18vw;
}

/**************************购物车**************************/
.wrapper .cart {
    width: 100%;
    height: 14vw;

    position: fixed;
    left: 0;
    bottom: 0;


    display: flex;
}

.wrapper .cart .left {
    flex: 2;
    background-color: #505051;

    display: flex;
}

.wrapper .cart .left .icon {
    width: 16vw;
    height: 16vw;
    box-sizing: border-box;
    border: solid 1.6vw #444;
    border-radius: 8vw;
    background-color: #3190E8;
    font-size: 7vw;
    color: #fff;

    display: flex;
    justify-content: center;
    align-items: center;

    margin-top: -4vw;
    margin-left: 3vw;

    position: relative;
}

.wrapper .cart .left .icon .quantity {
    width: 5vw;
    height: 5vw;
    border-radius: 2.5vw;
    background-color: red;
    color: #fff;
    font-size: 3.6vw;

    display: flex;
    justify-content: center;
    align-items: center;

    position: absolute;
    right: -1.5vw;
    top: -1.5vw;
}

.wrapper .cart .left .info p:first-child {
    font-size: 4.5vw;
    color: #fff;
    margin-top: 1vw;
}

.wrapper .cart .left .info p:last-child {
    font-size: 2.8vw;
    color: #AAA;
}

.wrapper .cart .right {
    flex: 1;
}

/**达到起送费**/

.wrapper .cart .right .twosituations {
    background-color: #38CA73;
    width: 100%;
    height: 100%;
    color: #fff;
    font-size: 4.5vw;
    font-weight: 700;
    user-select: none;
    cursor: pointer;

    display: flex;
    justify-content: center;
    align-items: center;
}
</style>